add a _fast version of bm_unload() to be used in modelinterp and future graphics API code
clean up some modelinterp code to not use memcpy() everywhere so it's more platform compatible and matches old code (Jens Granseuer)
NaN check to catch shards-of-death and prevent hitting an Assert() (Jens Granseuer)
fix jumpnode code to catch model errors and close a memory leak
make the call to bm_unload_all() after model_free_all() since we will get bmpman screwups otherwise
don't show hardware sound RAM when using OpenAL build, it will always be 0
print top-right memory figures in debug builds slighly further over when 1024+ res